WOLFRAM SYSTEM MODELER
SMEE_GeneratorElectrical excited synchronous machine operating as generator |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Modelica.Magnetic.QuasiStatic.FundamentalWave.Examples.BasicMachines.SynchronousMachines.SMEE_Generator"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This example compares a time transient and a quasi-static model of a electrically excited synchronous machine. The electrically excited synchronous generators are connected to the grid and driven with constant speed. Since speed is slightly smaller than synchronous speed corresponding to mains frequency, rotor angle is very slowly increased. This allows to see several characteristics dependent on rotor angle.
Simulate for 30 seconds and plot versus rotorAngle|rotorAngleQS.rotorDisplacementAngle:
smpm|smpmQS.tauElectrical: machine torque
Since the rotor slip is very low the transient and quasi-static electromagnetic torque are practically equal.
Parameters (8)
| m |
Value: 3 Type: Integer Description: Number of stator phases |
|---|---|
| VsNominal |
Value: 100 Type: Voltage (V) Description: Nominal RMS voltage per phase |
| fsNominal |
Value: smeeData.fsNominal Type: Frequency (Hz) Description: Nominal frequency |
| w |
Value: Modelica.Units.Conversions.from_rpm(1499) Type: AngularVelocity (rad/s) Description: Nominal speed |
| Ie |
Value: 19 Type: Current (A) Description: Excitation current |
| Ie0 |
Value: 10 Type: Current (A) Description: Initial excitation current |
| gamma0 |
Value: 0 Type: Angle (rad) Description: Initial rotor displacement angle |
| smeeData |
Value: Type: SynchronousMachineData Description: Synchronous machine data |
Outputs (2)
Components (27)
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star |
Type: Star Description: Star-connection |
|---|---|---|
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grounde |
Type: Ground Description: Ground node |
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sineVoltage |
Type: SineVoltage Description: Polyphase sine voltage source |
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powerSensor |
Type: PowerSensor Description: Polyphase instantaneous power sensor |
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terminalBoxM |
Type: MultiTerminalBox Description: Terminal box Y/D-connection |
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smee |
Type: SM_ElectricalExcited Description: Electrical excited synchronous machine with optional damper cage |
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smeeQS |
Type: SM_ElectricalExcited Description: Electrical excited synchronous machine with optional damper cage |
|
groundr |
Type: Ground Description: Ground node |
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groundrQS |
Type: Ground Description: Ground node |
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rampCurrent |
Type: RampCurrent Description: Ramp current source |
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rampCurrentQS |
Type: RampCurrent Description: Ramp current source |
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mechanicalPowerSensor |
Type: MechanicalPowerSensor Description: Mechanical power = torque x speed |
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mechanicalPowerSensorQS |
Type: MechanicalPowerSensor Description: Mechanical power = torque x speed |
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constantSpeed |
Type: ConstantSpeed Description: Constant speed, not dependent on torque |
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constantSpeedQS |
Type: ConstantSpeed Description: Constant speed, not dependent on torque |
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smeeData |
Type: SynchronousMachineData Description: Synchronous machine data |
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voltageSourceQS |
Type: VoltageSource Description: Constant polyphase AC voltage |
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starQS |
Type: Star Description: Star connection |
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groundeQS |
Type: Ground Description: Electrical ground |
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powerSensorQS |
Type: PowerSensor Description: Power sensor |
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terminalBoxQS |
Type: MultiTerminalBox Description: Terminal box Y/D-connection |
|
starMachineQS |
Type: Star Description: Star connection |
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groundMachineQS |
Type: Ground Description: Electrical ground |
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rotorAngle |
Type: RotorDisplacementAngle Description: Rotor lagging angle |
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rotorAngleQS |
Type: RotorDisplacementAngle Description: Rotor lagging angle |
|
groundMachine |
Type: Ground Description: Ground node |
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starMachine |
Type: Star Description: Star-connection |